// sbrk.cc -- really naive right now.

// TODO: replace with a robust version of morecore, that can handle non-
// contiguous arenas.

/*
   Copyright 2006 Corey Tabaka

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/


// defined in service.ld
extern unsigned char heap_base[];
extern unsigned char code[];
extern unsigned char end[];
extern unsigned char data_end[];

static unsigned int heap_break = (unsigned int) heap_base;

// used by malloc to adjust the heap
extern "C"
void *sbrk(long size) {
	/*printf("sbrk: old brk: %08x %ld bytes new brk: %08lx\n", heap_break, size,
		heap_break + size);*/
	
	unsigned int brk = heap_break;
	heap_break += size;
	
	return (void *) brk;
}
